Designation:D6440−10(Reapproved2018)StandardTerminologyRelatingtoHydrocarbonResins1ThisstandardisissuedunderthefixeddesignationD6440;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thehydrocarbonresinindustrycontinuestoevolvefromasourceofreplacementproductsfornaturally-derivedmaterialstoindustrialmaterialsthathavenonaturally-derivedcounterparts.Alongwiththischangingcharacteroftheindustry,variousmanufacturingparticipantshaveintroducedtermsthathaveledtoconfusionamongbothmanufacturersandconsumers.Thisterminologystandardisintendedtoalleviatethatconfusionandpromotestandardusageoftermsinthehydrocarbonresinindustry.1.2ResinsderivedprincipallyfromnaturalterpenefractionsareunderthejurisdictionofD01.34.1.3Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.Terminology2.1Definitions:C5aliphaticresin,n—aresinproducedbythecationicpolymerizationofalow-boilingaliphaticsteam-crackerfraction.DISCUSSION—Theprincipalmonomersaretypicallycis-andtrans-piperylene(1,3–pentadiene).C9aromaticresin,n—aresinproducedbythecationicpolymerizationofheavyaromaticsteam-crackerorcoal-tarfractions.DISCUSSION—TheC9designationisbroadandmayincludestyrene,indene,methylstyrenes,andmethylindenes.DependingonthesourceoftheC9fraction,itmayalsoincludecoumaroneanddicyclopentadi-ene.cloudpoint,n—thetemperatureatwhichadefinedliquidmixture,undercontrolledcooling,producesperceptiblehazeorcloudinessduetotheformationoffineparticlesofanincompatiblematerial.dicyclopentadieneresin,n—aresinproducedbythethermalpolymerizationofaconcentrateddicyclopentadienestream.hydrocar...
